Backflow Prevention

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757NaDCDA

Double Check Detector Assemblies, Stainless Steel

Size(s):

2 1/2 to 6 in. (65 to 150mm)

Description:

Series 757NaDCDA Double Check Detector Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating bi-link check valves, two shutoff valves, and four test cocks. It features a stainless steel housing and sleeve and is 70% lighter than traditional designs. Series 757NaDCDA is designed for non-health hazard applications and may be installed under continuous pressure service to protect against both backpressure and backsiphonage. This Series is used primarily on fire sprinkler lines when it is necessary to monitor unauthorized use of water. Maximum Working Pressure: 175psi (12.06 bar).

To preview and download BIM Drawings for this product, please select a model/size from the list.

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Disclaimer:
Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts
Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring
any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Learn About

There are a number of potential cross-connections in household plumbing systems that must be protected against backflow. To learn more about these hazards and to download a recent study from USC on cross-connections in household plumbing systems,